Lobulated; spindle-stelalte cells in loose fascicles
Pale eosinophilic cytoplasm
Ovoid euchromatic nueclei; inconspicuous mitotic activity
Collagenous-myxoid stroma; variably-sized blood vessels with occasional perivascular hyalinization
Scattered uni- and multivacuolated lipoblasts
IHC: desmin, CD34, S100, androgen receptor
RNA-seq: negative
PMID: 12047760, 25929353, 37307874, 37355153